1 have a 2005 Land Cruiser. I had a Bull Bar installed and the Engine, VSC off and VSC Trac lights came on. I have taken my rig to the local Toyota Dealership five times and two local mechanics. The code read gas cap. I have replaced the gas cap twice. The dealership has smoked tested the system twice and nothing can be found. The gas filler tube has been cleaned and sanded. Any idea what can be causing this?